pkg/report: better titles for some kmalloc bugs

3 files changed, 389 insertions, 0 deletions

diff --git a/pkg/report/testdata/linux/report/202 b/pkg/report/testdata/linux/report/202
new file mode 100644
index 000000000..11ca2b0eb
--- /dev/null
+++ b/pkg/report/testdata/linux/report/202
@@ -0,0 +1,176 @@
+TITLE: WARNING: suspicious RCU usage in rds_tcp_conn_alloc
+
+[  130.359031] =============================
+[  130.363221] WARNING: suspicious RCU usage
+[  130.367384] 4.15.0+ #307 Not tainted
+[  130.371129] -----------------------------
+[  130.375415] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section!
+[  130.384715] 
+[  130.384715] other info that might help us debug this:
+[  130.384715] 
+[  130.392872] 
+[  130.392872] rcu_scheduler_active = 2, debug_locks = 1
+[  130.399555] 1 lock held by syz-executor2/31597:
+[  130.404221]  #0:  (rcu_read_lock){....}, at: [<00000000b2f91fff>] __rds_conn_create+0xe46/0x1b50
+[  130.413178] 
+[  130.413178] stack backtrace:
+[  130.417685] CPU: 1 PID: 31597 Comm: syz-executor2 Not tainted 4.15.0+ #307
+[  130.424682] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
+[  130.434012] Call Trace:
+[  130.436584]  dump_stack+0x194/0x257
+[  130.440189]  ? arch_local_irq_restore+0x53/0x53
+[  130.444843]  lockdep_rcu_suspicious+0x123/0x170
+[  130.449503]  ___might_sleep+0x385/0x470
+[  130.453459]  ? trace_event_raw_event_sched_switch+0x810/0x810
+[  130.459325]  ? debug_mutex_init+0x1c/0x60
+[  130.463463]  ? trace_hardirqs_on_caller+0x421/0x5c0
+[  130.468467]  __might_sleep+0x95/0x190
+[  130.472247]  kmem_cache_alloc+0x2a2/0x760
+[  130.476372]  ? lock_acquire+0x1d5/0x580
+[  130.480320]  ? __rds_conn_create+0xe46/0x1b50
+[  130.484788]  ? SyS_membarrier+0x700/0x700
+[  130.488907]  ? init_timer_key+0x163/0x3f0
+[  130.493045]  rds_tcp_conn_alloc+0xa7/0x4e0
+[  130.497266]  ? rds_tcp_conn_free+0x2d0/0x2d0
+[  130.501649]  ? rds_cmsg_atomic+0xff0/0xff0
+[  130.505858]  ? __lockdep_init_map+0xe4/0x650
+[  130.510240]  ? rds_cmsg_atomic+0xff0/0xff0
+[  130.514451]  __rds_conn_create+0x112f/0x1b50
+[  130.518851]  ? rds_conn_drop+0xb0/0xb0
+[  130.522720]  ? trace_hardirqs_on_caller+0x421/0x5c0
+[  130.527714]  ? trace_hardirqs_on_thunk+0x1a/0x1c
+[  130.532446]  ? __raw_spin_lock_init+0x1c/0x100
+[  130.537011]  ? trace_hardirqs_on_caller+0x421/0x5c0
+[  130.542022]  ? __lockdep_init_map+0xe4/0x650
+[  130.546415]  ? lockdep_init_map+0x9/0x10
+[  130.550450]  ? __init_waitqueue_head+0x97/0x140
+[  130.555091]  ? init_wait_entry+0x1b0/0x1b0
+[  130.559306]  ? lockdep_init_map+0x9/0x10
+[  130.563347]  ? rds_message_alloc+0x28c/0x330
+[  130.567730]  ? rds_message_next_extension+0x210/0x210
+[  130.572896]  ? rds_rdma_extra_size+0x205/0x2b0
+[  130.577459]  ? rds_atomic_free_op+0x330/0x330
+[  130.581929]  ? lock_sock_nested+0x91/0x110
+[  130.586157]  rds_conn_create_outgoing+0x3f/0x50
+[  130.590815]  rds_sendmsg+0xda3/0x2390
+[  130.594614]  ? rds_send_drop_to+0x19d0/0x19d0
+[  130.599101]  ? find_held_lock+0x35/0x1d0
+[  130.603149]  ? sock_has_perm+0x2a4/0x420
+[  130.607201]  ? selinux_secmark_relabel_packet+0xc0/0xc0
+[  130.612542]  ? lock_downgrade+0x980/0x980
+[  130.616676]  ? lock_release+0xa40/0xa40
+[  130.620637]  ? selinux_socket_sendmsg+0x36/0x40
+[  130.625282]  ? security_socket_sendmsg+0x89/0xb0
+[  130.630020]  ? rds_send_drop_to+0x19d0/0x19d0
+[  130.634500]  sock_sendmsg+0xca/0x110
+[  130.638192]  ___sys_sendmsg+0x767/0x8b0
+[  130.642147]  ? copy_msghdr_from_user+0x590/0x590
+[  130.646882]  ? __schedule+0x8ea/0x2040
+[  130.650751]  ? __sched_text_start+0x8/0x8
+[  130.654886]  ? __fget_light+0x2b2/0x3c0
+[  130.658836]  ? fget_raw+0x20/0x20
+[  130.662267]  ? __might_sleep+0x95/0x190
+[  130.666241]  __sys_sendmsg+0xe5/0x210
+[  130.670020]  ? __sys_sendmsg+0xe5/0x210
+[  130.673974]  ? SyS_shutdown+0x290/0x290
+[  130.677950]  ? exit_to_usermode_loop+0x8c/0x2f0
+[  130.682606]  ? trace_event_raw_event_sys_exit+0x260/0x260
+[  130.688123]  SyS_sendmsg+0x2d/0x50
+[  130.691639]  ? __sys_sendmsg+0x210/0x210
+[  130.695674]  do_syscall_64+0x282/0x940
+[  130.699538]  ? __do_page_fault+0xc90/0xc90
+[  130.703756]  ? finish_task_switch+0x1e2/0x890
+[  130.708227]  ? finish_task_switch+0x1b9/0x890
+[  130.712701]  ? syscall_return_slowpath+0x550/0x550
+[  130.717608]  ? syscall_return_slowpath+0x2ac/0x550
+[  130.722516]  ? prepare_exit_to_usermode+0x350/0x350
+[  130.727508]  ? entry_SYSCALL_64_after_hwframe+0x36/0x9b
+[  130.732850]  ? trace_hardirqs_off_thunk+0x1a/0x1c
+[  130.737673]  entry_SYSCALL_64_after_hwframe+0x26/0x9b
+[  130.742835] RIP: 0033:0x4537d9
+[  130.745997] RSP: 002b:00007f13a9e2cc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
+[  130.753686] RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 00000000004537d9
+[  130.760936] RDX: 0000000000000000 RSI: 0000000020006fc8 RDI: 0000000000000013
+[  130.768188] RBP: 00000000000004b5 R08: 0000000000000000 R09: 0000000000000000
+[  130.775431] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6198
+[  130.782672] R13: 00000000ffffffff R14: 00007f13a9e2d6d4 R15: 0000000000000000
+[  130.789977] BUG: sleeping function called from invalid context at mm/slab.h:420
+[  130.797427] in_atomic(): 1, irqs_disabled(): 0, pid: 31597, name: syz-executor2
+[  130.804874] 1 lock held by syz-executor2/31597:
+[  130.809534]  #0:  (rcu_read_lock){....}, at: [<00000000b2f91fff>] __rds_conn_create+0xe46/0x1b50
+[  130.818487] CPU: 1 PID: 31597 Comm: syz-executor2 Not tainted 4.15.0+ #307
+[  130.825481] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
+[  130.834808] Call Trace:
+[  130.837373]  dump_stack+0x194/0x257
+[  130.840983]  ? arch_local_irq_restore+0x53/0x53
+[  130.845634]  ? print_lock+0x9f/0xa2
+[  130.849245]  ? lockdep_print_held_locks+0xc4/0x130
+[  130.854156]  ___might_sleep+0x2b2/0x470
+[  130.858106]  ? trace_event_raw_event_sched_switch+0x810/0x810
+[  130.863960]  ? debug_mutex_init+0x1c/0x60
+[  130.868085]  ? trace_hardirqs_on_caller+0x421/0x5c0
+[  130.873084]  __might_sleep+0x95/0x190
+[  130.876862]  kmem_cache_alloc+0x2a2/0x760
+[  130.880985]  ? lock_acquire+0x1d5/0x580
+[  130.884932]  ? __rds_conn_create+0xe46/0x1b50
+[  130.889402]  ? SyS_membarrier+0x700/0x700
+[  130.893522]  ? init_timer_key+0x163/0x3f0
+[  130.897648]  rds_tcp_conn_alloc+0xa7/0x4e0
+[  130.901859]  ? rds_tcp_conn_free+0x2d0/0x2d0
+[  130.906241]  ? rds_cmsg_atomic+0xff0/0xff0
+[  130.910452]  ? __lockdep_init_map+0xe4/0x650
+[  130.914833]  ? rds_cmsg_atomic+0xff0/0xff0
+[  130.919046]  __rds_conn_create+0x112f/0x1b50
+[  130.923448]  ? rds_conn_drop+0xb0/0xb0
+[  130.927310]  ? trace_hardirqs_on_caller+0x421/0x5c0
+[  130.932300]  ? trace_hardirqs_on_thunk+0x1a/0x1c
+[  130.937040]  ? __raw_spin_lock_init+0x1c/0x100
+[  130.941615]  ? trace_hardirqs_on_caller+0x421/0x5c0
+[  130.946610]  ? __lockdep_init_map+0xe4/0x650
+[  130.950994]  ? lockdep_init_map+0x9/0x10
+[  130.955039]  ? __init_waitqueue_head+0x97/0x140
+[  130.959683]  ? init_wait_entry+0x1b0/0x1b0
+[  130.963893]  ? lockdep_init_map+0x9/0x10
+[  130.967931]  ? rds_message_alloc+0x28c/0x330
+[  130.972310]  ? rds_message_next_extension+0x210/0x210
+[  130.977474]  ? rds_rdma_extra_size+0x205/0x2b0
+[  130.982042]  ? rds_atomic_free_op+0x330/0x330
+[  130.986511]  ? lock_sock_nested+0x91/0x110
+[  130.990725]  rds_conn_create_outgoing+0x3f/0x50
+[  130.995369]  rds_sendmsg+0xda3/0x2390
+[  130.999177]  ? rds_send_drop_to+0x19d0/0x19d0
+[  131.003667]  ? find_held_lock+0x35/0x1d0
+[  131.007706]  ? sock_has_perm+0x2a4/0x420
+[  131.011744]  ? selinux_secmark_relabel_packet+0xc0/0xc0
+[  131.017080]  ? lock_downgrade+0x980/0x980
+[  131.021202]  ? lock_release+0xa40/0xa40
+[  131.025165]  ? selinux_socket_sendmsg+0x36/0x40
+[  131.029808]  ? security_socket_sendmsg+0x89/0xb0
+[  131.034539]  ? rds_send_drop_to+0x19d0/0x19d0
+[  131.039014]  sock_sendmsg+0xca/0x110
+[  131.042711]  ___sys_sendmsg+0x767/0x8b0
+[  131.046664]  ? copy_msghdr_from_user+0x590/0x590
+[  131.051393]  ? __schedule+0x8ea/0x2040
+[  131.055259]  ? __sched_text_start+0x8/0x8
+[  131.059387]  ? __fget_light+0x2b2/0x3c0
+[  131.063336]  ? fget_raw+0x20/0x20
+[  131.066769]  ? __might_sleep+0x95/0x190
+[  131.070741]  __sys_sendmsg+0xe5/0x210
+[  131.074516]  ? __sys_sendmsg+0xe5/0x210
+[  131.078466]  ? SyS_shutdown+0x290/0x290
+[  131.082423]  ? exit_to_usermode_loop+0x8c/0x2f0
+[  131.087080]  ? trace_event_raw_event_sys_exit+0x260/0x260
+[  131.092600]  SyS_sendmsg+0x2d/0x50
+[  131.096111]  ? __sys_sendmsg+0x210/0x210
+[  131.100146]  do_syscall_64+0x282/0x940
+[  131.104008]  ? __do_page_fault+0xc90/0xc90
+[  131.108222]  ? finish_task_switch+0x1e2/0x890
+[  131.112686]  ? finish_task_switch+0x1b9/0x890
+[  131.117156]  ? syscall_return_slowpath+0x550/0x550
+[  131.122057]  ? syscall_return_slowpath+0x2ac/0x550
+[  131.126958]  ? prepare_exit_to_usermode+0x350/0x350
+[  131.131950]  ? entry_SYSCALL_64_after_hwframe+0x36/0x9b
+[  131.137291]  ? trace_hardirqs_off_thunk+0x1a/0x1c
+[  131.142115]  entry_SYSCALL_64_after_hwframe+0x26/0x9b
+[  131.147277] RIP: 0033:0x4537d9
+[  131.150440] RSP: 002b:00007f13a9e2cc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
diff --git a/pkg/report/testdata/linux/report/203 b/pkg/report/testdata/linux/report/203
new file mode 100644
index 000000000..e7be16a9c
--- /dev/null
+++ b/pkg/report/testdata/linux/report/203
@@ -0,0 +1,176 @@
+TITLE: WARNING: suspicious RCU usage in rds_loop_conn_alloc
+
+[   40.467154] =============================
+[   40.471339] WARNING: suspicious RCU usage
+[   40.475501] 4.15.0+ #307 Not tainted
+[   40.479229] -----------------------------
+[   40.483386] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section!
+[   40.492665] 
+[   40.492665] other info that might help us debug this:
+[   40.492665] 
+[   40.500828] 
+[   40.500828] rcu_scheduler_active = 2, debug_locks = 1
+[   40.507516] 1 lock held by syz-executor1/6886:
+[   40.512120]  #0:  (rcu_read_lock){....}, at: [<00000000d1a2b4e9>] __rds_conn_create+0xe46/0x1b50
+[   40.521101] 
+[   40.521101] stack backtrace:
+[   40.525627] CPU: 1 PID: 6886 Comm: syz-executor1 Not tainted 4.15.0+ #307
+[   40.532541] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
+[   40.541884] Call Trace:
+[   40.544466]  dump_stack+0x194/0x257
+[   40.548094]  ? arch_local_irq_restore+0x53/0x53
+[   40.552780]  lockdep_rcu_suspicious+0x123/0x170
+[   40.557455]  ___might_sleep+0x385/0x470
+[   40.561428]  ? trace_event_raw_event_sched_switch+0x810/0x810
+[   40.567307]  ? __debug_object_init+0x235/0x1040
+[   40.571977]  ? debug_mutex_init+0x1c/0x60
+[   40.576132]  __might_sleep+0x95/0x190
+[   40.579937]  kmem_cache_alloc_trace+0x299/0x740
+[   40.584602]  ? lock_acquire+0x1d5/0x580
+[   40.588570]  ? lock_acquire+0x1d5/0x580
+[   40.592538]  ? __rds_conn_create+0xe46/0x1b50
+[   40.597039]  rds_loop_conn_alloc+0xc8/0x380
+[   40.601362]  ? rds_loop_conn_free+0x290/0x290
+[   40.605856]  ? __init_waitqueue_head+0x97/0x140
+[   40.610524]  ? rcutorture_record_progress+0x10/0x10
+[   40.615536]  ? __lockdep_init_map+0xe4/0x650
+[   40.619950]  __rds_conn_create+0x112f/0x1b50
+[   40.624387]  ? rds_conn_drop+0xb0/0xb0
+[   40.628294]  ? __raw_spin_lock_init+0x1c/0x100
+[   40.632878]  ? trace_hardirqs_on_caller+0x421/0x5c0
+[   40.637897]  ? __lockdep_init_map+0xe4/0x650
+[   40.642304]  ? lockdep_init_map+0x9/0x10
+[   40.646362]  ? __init_waitqueue_head+0x97/0x140
+[   40.651029]  ? init_wait_entry+0x1b0/0x1b0
+[   40.655278]  ? lockdep_init_map+0x9/0x10
+[   40.659351]  ? rds_message_alloc+0x28c/0x330
+[   40.663746]  ? rds_message_next_extension+0x210/0x210
+[   40.668923]  ? trace_hardirqs_on+0xd/0x10
+[   40.673073]  ? _raw_spin_unlock_bh+0x30/0x40
+[   40.677475]  ? __release_sock+0x360/0x360
+[   40.681597]  ? lock_sock_nested+0x91/0x110
+[   40.685815]  rds_conn_create_outgoing+0x3f/0x50
+[   40.690471]  rds_sendmsg+0xda3/0x2390
+[   40.694248]  ? avc_has_perm+0x43e/0x680
+[   40.698224]  ? rds_send_drop_to+0x19d0/0x19d0
+[   40.702696]  ? iterate_fd+0x3f0/0x3f0
+[   40.706477]  ? debug_check_no_locks_freed+0x3c0/0x3c0
+[   40.711646]  ? find_held_lock+0x35/0x1d0
+[   40.715690]  ? sock_has_perm+0x2a4/0x420
+[   40.719737]  ? selinux_secmark_relabel_packet+0xc0/0xc0
+[   40.725077]  ? lock_release+0xa02/0xa40
+[   40.729034]  ? trace_event_raw_event_sched_switch+0x810/0x810
+[   40.734896]  ? __check_object_size+0x8b/0x530
+[   40.739376]  ? __might_sleep+0x95/0x190
+[   40.743330]  ? selinux_socket_sendmsg+0x36/0x40
+[   40.747972]  ? security_socket_sendmsg+0x89/0xb0
+[   40.752706]  ? rds_send_drop_to+0x19d0/0x19d0
+[   40.757176]  sock_sendmsg+0xca/0x110
+[   40.760869]  SYSC_sendto+0x361/0x5c0
+[   40.764562]  ? SYSC_connect+0x4a0/0x4a0
+[   40.768511]  ? trace_event_raw_event_sched_switch+0x810/0x810
+[   40.774369]  ? find_held_lock+0x35/0x1d0
+[   40.778409]  ? kcov_close+0x20/0x20
+[   40.782013]  ? _raw_spin_unlock+0x22/0x30
+[   40.786142]  ? kcov_ioctl+0x56/0x1b0
+[   40.789834]  ? do_vfs_ioctl+0x486/0x1520
+[   40.793898]  ? selinux_capable+0x40/0x40
+[   40.797940]  ? trace_hardirqs_on+0xd/0x10
+[   40.802077]  ? security_file_ioctl+0x7d/0xb0
+[   40.806460]  ? security_file_ioctl+0x89/0xb0
+[   40.810848]  SyS_sendto+0x40/0x50
+[   40.814274]  ? SyS_getpeername+0x30/0x30
+[   40.818311]  do_syscall_64+0x282/0x940
+[   40.822175]  ? finish_task_switch+0x5af/0x890
+[   40.826651]  ? syscall_return_slowpath+0x550/0x550
+[   40.831554]  ? syscall_return_slowpath+0x2ac/0x550
+[   40.836459]  ? prepare_exit_to_usermode+0x350/0x350
+[   40.841451]  ? entry_SYSCALL_64_after_hwframe+0x36/0x9b
+[   40.846797]  ? trace_hardirqs_off_thunk+0x1a/0x1c
+[   40.851619]  entry_SYSCALL_64_after_hwframe+0x26/0x9b
+[   40.856784] RIP: 0033:0x4537d9
+[   40.859949] RSP: 002b:00007f726e79bc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002c
+[   40.867627] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 00000000004537d9
+[   40.874868] RDX: 0000000000000000 RSI: 0000000020fbffff RDI: 0000000000000013
+[   40.882119] RBP: 00000000000004b9 R08: 0000000020fc9000 R09: 0000000000000010
+[   40.889361] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f61f8
+[   40.896605] R13: 00000000ffffffff R14: 00007f726e79c6d4 R15: 0000000000000005
+[   40.903911] BUG: sleeping function called from invalid context at mm/slab.h:420
+[   40.911359] in_atomic(): 1, irqs_disabled(): 0, pid: 6886, name: syz-executor1
+[   40.918722] 1 lock held by syz-executor1/6886:
+[   40.923317]  #0:  (rcu_read_lock){....}, at: [<00000000d1a2b4e9>] __rds_conn_create+0xe46/0x1b50
+[   40.932274] CPU: 1 PID: 6886 Comm: syz-executor1 Not tainted 4.15.0+ #307
+[   40.939177] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
+[   40.948511] Call Trace:
+[   40.951086]  dump_stack+0x194/0x257
+[   40.954687]  ? arch_local_irq_restore+0x53/0x53
+[   40.959333]  ? print_lock+0x9f/0xa2
+[   40.962935]  ? lockdep_print_held_locks+0xc4/0x130
+[   40.967845]  ___might_sleep+0x2b2/0x470
+[   40.971801]  ? trace_event_raw_event_sched_switch+0x810/0x810
+[   40.977667]  ? __debug_object_init+0x235/0x1040
+[   40.982313]  ? debug_mutex_init+0x1c/0x60
+[   40.986440]  __might_sleep+0x95/0x190
+[   40.990219]  kmem_cache_alloc_trace+0x299/0x740
+[   40.994865]  ? lock_acquire+0x1d5/0x580
+[   40.998813]  ? lock_acquire+0x1d5/0x580
+[   41.002766]  ? __rds_conn_create+0xe46/0x1b50
+[   41.007239]  rds_loop_conn_alloc+0xc8/0x380
+[   41.011535]  ? rds_loop_conn_free+0x290/0x290
+[   41.016006]  ? __init_waitqueue_head+0x97/0x140
+[   41.020659]  ? rcutorture_record_progress+0x10/0x10
+[   41.025648]  ? __lockdep_init_map+0xe4/0x650
+[   41.030050]  __rds_conn_create+0x112f/0x1b50
+[   41.034456]  ? rds_conn_drop+0xb0/0xb0
+[   41.038327]  ? __raw_spin_lock_init+0x1c/0x100
+[   41.042884]  ? trace_hardirqs_on_caller+0x421/0x5c0
+[   41.047877]  ? __lockdep_init_map+0xe4/0x650
+[   41.052269]  ? lockdep_init_map+0x9/0x10
+[   41.056307]  ? __init_waitqueue_head+0x97/0x140
+[   41.060950]  ? init_wait_entry+0x1b0/0x1b0
+[   41.065161]  ? lockdep_init_map+0x9/0x10
+[   41.069197]  ? rds_message_alloc+0x28c/0x330
+[   41.073578]  ? rds_message_next_extension+0x210/0x210
+[   41.078738]  ? trace_hardirqs_on+0xd/0x10
+[   41.082866]  ? _raw_spin_unlock_bh+0x30/0x40
+[   41.087259]  ? __release_sock+0x360/0x360
+[   41.091378]  ? lock_sock_nested+0x91/0x110
+[   41.095593]  rds_conn_create_outgoing+0x3f/0x50
+[   41.100237]  rds_sendmsg+0xda3/0x2390
+[   41.104011]  ? avc_has_perm+0x43e/0x680
+[   41.107977]  ? rds_send_drop_to+0x19d0/0x19d0
+[   41.112455]  ? iterate_fd+0x3f0/0x3f0
+[   41.116232]  ? debug_check_no_locks_freed+0x3c0/0x3c0
+[   41.121398]  ? find_held_lock+0x35/0x1d0
+[   41.125462]  ? sock_has_perm+0x2a4/0x420
+[   41.129502]  ? selinux_secmark_relabel_packet+0xc0/0xc0
+[   41.134836]  ? lock_release+0xa02/0xa40
+[   41.138785]  ? trace_event_raw_event_sched_switch+0x810/0x810
+[   41.144642]  ? __check_object_size+0x8b/0x530
+[   41.149124]  ? __might_sleep+0x95/0x190
+[   41.153076]  ? selinux_socket_sendmsg+0x36/0x40
+[   41.157717]  ? security_socket_sendmsg+0x89/0xb0
+[   41.162447]  ? rds_send_drop_to+0x19d0/0x19d0
+[   41.166916]  sock_sendmsg+0xca/0x110
+[   41.170607]  SYSC_sendto+0x361/0x5c0
+[   41.174299]  ? SYSC_connect+0x4a0/0x4a0
+[   41.178245]  ? trace_event_raw_event_sched_switch+0x810/0x810
+[   41.184110]  ? find_held_lock+0x35/0x1d0
+[   41.188161]  ? kcov_close+0x20/0x20
+[   41.191763]  ? _raw_spin_unlock+0x22/0x30
+[   41.195890]  ? kcov_ioctl+0x56/0x1b0
+[   41.199580]  ? do_vfs_ioctl+0x486/0x1520
+[   41.203624]  ? selinux_capable+0x40/0x40
+[   41.207665]  ? trace_hardirqs_on+0xd/0x10
+[   41.211793]  ? security_file_ioctl+0x7d/0xb0
+[   41.216174]  ? security_file_ioctl+0x89/0xb0
+[   41.220559]  SyS_sendto+0x40/0x50
+[   41.223994]  ? SyS_getpeername+0x30/0x30
+[   41.228038]  do_syscall_64+0x282/0x940
+[   41.231900]  ? finish_task_switch+0x5af/0x890
+[   41.236370]  ? syscall_return_slowpath+0x550/0x550
+[   41.241275]  ? syscall_return_slowpath+0x2ac/0x550
+[   41.246180]  ? prepare_exit_to_usermode+0x350/0x350
+[   41.251172]  ? entry_SYSCALL_64_after_hwframe+0x36/0x9b
+[   41.256519]  ? trace_hardirqs_off_thunk+0x1a/0x1c
+[   41.261347]  entry_SYSCALL_64_after_hwframe+0x26/0x9b
diff --git a/pkg/report/testdata/linux/report/204 b/pkg/report/testdata/linux/report/204
new file mode 100644
index 000000000..777d076f9
--- /dev/null
+++ b/pkg/report/testdata/linux/report/204
@@ -0,0 +1,37 @@
+TITLE: WARNING: kmalloc bug in kvm_vm_ioctl
+
+[  232.358467] ------------[ cut here ]------------
+[  232.358478] WARNING: CPU: 1 PID: 36348 at mm/slab_common.c:903 kmalloc_slab+0x89/0xa0()
+[  232.358482] Modules linked in:
+[  232.375269]  0000000000000000 ffff8801d1327980 ffffffff81da3492 1ffff1003a264f34
+[  232.383292]  ffff8801d42f0000 ffffffff8311a3a0 ffff8801d1327a40 0000000000400000
+[  232.391306]  ffff8801d1327a98 ffffffff816acb58 0000000000000001 024000c2d42f0000
+[  232.399313] Call Trace:
+[  232.401884]  [<ffffffff81da3492>] dump_stack+0xf6/0x184
+[  232.407224]  [<ffffffff816acb58>] warn_alloc+0x208/0x230
+[  232.412658]  [<ffffffff816ac950>] ? zone_watermark_ok_safe+0x2b0/0x2b0
+[  232.419307]  [<ffffffff812b43a8>] ? __do_page_fault+0x398/0x940
+[  232.425350]  [<ffffffff82e2541c>] ? retint_kernel+0x4e/0x4e
+[  232.431042]  [<ffffffff81777c90>] __vmalloc_node_range_memcg+0x510/0x670
+[  232.437862]  [<ffffffff82e2541c>] ? retint_kernel+0x4e/0x4e
+[  232.443549]  [<ffffffff81777e59>] vmalloc+0x69/0x70
+[  232.448543]  [<ffffffff81087150>] ? kvm_vm_ioctl+0x910/0x15e0
+[  232.454406]  [<ffffffff81087150>] kvm_vm_ioctl+0x910/0x15e0
+[  232.460097]  [<ffffffff81086840>] ? kvm_vm_ioctl_set_memory_ondemand_state+0x4a0/0x4a0
+[  232.468130]  [<ffffffff815927fc>] ? tracing_generic_entry_update+0x15c/0x1d0
+[  232.475296]  [<ffffffff815d078d>] ? perf_trace_buf_prepare+0x18d/0x230
+[  232.482499]  [<ffffffff81662d85>] ? __perf_event_task_sched_in+0x655/0x8d0
+[  232.489489]  [<ffffffff8142da14>] ? perf_trace_lock+0x304/0x570
+[  232.495524]  [<ffffffff8142d710>] ? perf_trace_lock_acquire+0x5c0/0x5c0
+[  232.502256]  [<ffffffff81436380>] ? debug_check_no_locks_freed+0x370/0x370
+[  232.509247]  [<ffffffff818867c2>] ? __fget+0x282/0x590
+[  232.514502]  [<ffffffff81086840>] ? kvm_vm_ioctl_set_memory_ondemand_state+0x4a0/0x4a0
+[  232.522533]  [<ffffffff81866662>] do_vfs_ioctl+0x842/0xee0
+[  232.528137]  [<ffffffff81865e20>] ? ioctl_preallocate+0x200/0x200
+[  232.534355]  [<ffffffff818867eb>] ? __fget+0x2ab/0x590
+[  232.539607]  [<ffffffff8188658c>] ? __fget+0x4c/0x590
+[  232.544776]  [<ffffffff81886bbc>] ? __fget_light+0xac/0x450
+[  232.550466]  [<ffffffff82e24990>] ? int_ret_from_sys_call+0x52/0xba
+[  232.556851]  [<ffffffff81c42b8e>] ? security_file_ioctl+0x8e/0xc0
+[  232.563063]  [<ffffffff81866d94>] SyS_ioctl+0x94/0xc0
+[  232.568232]  [<ffffffff82e247d3>] entry_SYSCALL_64_fastpath+0x12/0x17