Title | Replies (including bot) | Last reply |
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[PATCH] mm: Ignore data-race in __swap_writepage | 1 (1) | 2024/07/11 16:32 |
[syzbot] [mm?] KCSAN: data-race in __swap_writepage / scan_swap_map_slots (2) | 0 (1) | 2024/07/08 10:15 |
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Title | Replies (including bot) | Last reply |
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[PATCH] mm: Ignore data-race in __swap_writepage | 1 (1) | 2024/07/11 16:32 |
[syzbot] [mm?] KCSAN: data-race in __swap_writepage / scan_swap_map_slots (2) | 0 (1) | 2024/07/08 10:15 |
================================================================== BUG: KCSAN: data-race in __swap_writepage / scan_swap_map_slots read-write to 0xffff888102fca610 of 8 bytes by task 7106 on cpu 1: scan_swap_map_slots+0xfee/0x10e0 get_swap_pages+0x30b/0x480 mm/swapfile.c:1115 folio_alloc_swap+0x3b7/0x490 mm/swap_slots.c:346 shmem_writepage+0x43e/0x970 mm/shmem.c:1493 pageout mm/vmscan.c:660 [inline] shrink_folio_list+0x194f/0x2560 mm/vmscan.c:1341 shrink_inactive_list mm/vmscan.c:1944 [inline] shrink_list mm/vmscan.c:2179 [inline] shrink_lruvec+0xbd9/0x15f0 mm/vmscan.c:5703 shrink_node_memcgs mm/vmscan.c:5889 [inline] shrink_node+0x9d1/0x13c0 mm/vmscan.c:5924 shrink_zones mm/vmscan.c:6168 [inline] do_try_to_free_pages+0x3c6/0xc50 mm/vmscan.c:6230 try_to_free_mem_cgroup_pages+0x1eb/0x4e0 mm/vmscan.c:6545 try_charge_memcg+0x27a/0xcd0 mm/memcontrol.c:2944 try_charge mm/memcontrol.c:3092 [inline] charge_memcg mm/memcontrol.c:7495 [inline] __mem_cgroup_charge+0x63/0x100 mm/memcontrol.c:7510 mem_cgroup_charge include/linux/memcontrol.h:691 [inline] shmem_alloc_and_add_folio mm/shmem.c:1677 [inline] shmem_get_folio_gfp+0x480/0xb70 mm/shmem.c:2055 shmem_get_folio mm/shmem.c:2160 [inline] shmem_write_begin+0xa0/0x1c0 mm/shmem.c:2743 generic_perform_write+0x1d5/0x410 mm/filemap.c:4015 shmem_file_write_iter+0xc8/0xf0 mm/shmem.c:2919 __kernel_write_iter+0x24f/0x4e0 fs/read_write.c:523 dump_emit_page fs/coredump.c:893 [inline] dump_user_range+0x3a7/0x550 fs/coredump.c:954 elf_core_dump+0x1aeb/0x1c30 fs/binfmt_elf.c:2083 do_coredump+0xff6/0x1860 fs/coredump.c:767 get_signal+0xdc1/0x1080 kernel/signal.c:2894 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] irqentry_exit_to_user_mode+0x94/0x130 kernel/entry/common.c:231 irqentry_exit+0x12/0x50 kernel/entry/common.c:334 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 read to 0xffff888102fca610 of 8 bytes by task 7080 on cpu 0: __swap_writepage+0x88/0xc50 mm/page_io.c:387 swap_writepage+0xa9/0x160 mm/page_io.c:209 shmem_writepage+0x7be/0x970 mm/shmem.c:1518 pageout mm/vmscan.c:660 [inline] shrink_folio_list+0x194f/0x2560 mm/vmscan.c:1341 shrink_inactive_list mm/vmscan.c:1944 [inline] shrink_list mm/vmscan.c:2179 [inline] shrink_lruvec+0xbd9/0x15f0 mm/vmscan.c:5703 shrink_node_memcgs mm/vmscan.c:5889 [inline] shrink_node+0x9d1/0x13c0 mm/vmscan.c:5924 shrink_zones mm/vmscan.c:6168 [inline] do_try_to_free_pages+0x3c6/0xc50 mm/vmscan.c:6230 try_to_free_mem_cgroup_pages+0x1eb/0x4e0 mm/vmscan.c:6545 try_charge_memcg+0x27a/0xcd0 mm/memcontrol.c:2944 try_charge mm/memcontrol.c:3092 [inline] charge_memcg mm/memcontrol.c:7495 [inline] __mem_cgroup_charge+0x63/0x100 mm/memcontrol.c:7510 mem_cgroup_charge include/linux/memcontrol.h:691 [inline] shmem_alloc_and_add_folio mm/shmem.c:1677 [inline] shmem_get_folio_gfp+0x480/0xb70 mm/shmem.c:2055 shmem_get_folio mm/shmem.c:2160 [inline] shmem_write_begin+0xa0/0x1c0 mm/shmem.c:2743 generic_perform_write+0x1d5/0x410 mm/filemap.c:4015 shmem_file_write_iter+0xc8/0xf0 mm/shmem.c:2919 __kernel_write_iter+0x24f/0x4e0 fs/read_write.c:523 dump_emit_page fs/coredump.c:893 [inline] dump_user_range+0x3a7/0x550 fs/coredump.c:954 elf_core_dump+0x1aeb/0x1c30 fs/binfmt_elf.c:2083 do_coredump+0xff6/0x1860 fs/coredump.c:767 get_signal+0xdc1/0x1080 kernel/signal.c:2894 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] irqentry_exit_to_user_mode+0x94/0x130 kernel/entry/common.c:231 irqentry_exit+0x12/0x50 kernel/entry/common.c:334 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 value changed: 0x0000000000008083 -> 0x0000000000004083 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7080 Comm: syz.3.1255 Not tainted 6.10.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/07/08 21:28 | upstream | 256abd8e550c | cde64f7d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in __swap_writepage / scan_swap_map_slots | ||
2024/07/08 07:42 | upstream | 256abd8e550c | 2a40360c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in __swap_writepage / scan_swap_map_slots |