ci starts bisection 2023-04-26 14:10:41.5063259 +0000 UTC m=+4185.180585810 bisecting fixing commit since a962b54e162c2977ff37905726cab29728380835 building syzkaller on feb5635181eb12a6e3516172a3f5af06a3bc93e1 ensuring issue is reproducible on original commit a962b54e162c2977ff37905726cab29728380835 testing commit a962b54e162c2977ff37905726cab29728380835 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: eb9843f77604dd8c0bbae3e89db608fcd423f791c3f1b5898b6316c85b09d55d run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: INFO: rcu detected stall in corrupted run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in corrupted run #9: crashed: INFO: rcu detected stall in corrupted run #10: crashed: INFO: rcu detected stall in corrupted run #11: crashed: INFO: rcu detected stall in corrupted run #12: crashed: INFO: rcu detected stall in corrupted run #13: crashed: BUG: unable to handle kernel paging request in inode_wait_for_writeback run #14: crashed: BUG: unable to handle kernel paging request in inode_wait_for_writeback run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK testing current HEAD 0cfd8703e7da687924371e9bc77a025bdeba9637 testing commit 0cfd8703e7da687924371e9bc77a025bdeba9637 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: a20b14171bf4e2d20492d5836edd8a77b3c23a4326e516f2c125566b876984a6 all runs: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync revisions tested: 2, total time: 40m47.972371643s (build: 13m11.813392625s, test: 26m38.817380837s) the crash still happens on HEAD commit msg: Merge tag 'pm-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm crash: KASAN: out-of-bounds Write in end_buffer_read_sync ================================================================== BUG: KASAN: out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: out-of-bounds in atomic_dec include/linux/atomic/atomic-instrumented.h:257 [inline] BUG: KASAN: out-of-bounds in put_bh include/linux/buffer_head.h:323 [inline] BUG: KASAN: out-of-bounds in end_buffer_read_sync+0x5c/0x90 fs/buffer.c:161 Write of size 4 at addr ffffc9000c69f9a8 by task ksoftirqd/0/15 CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.3.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x60/0xa0 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319 print_report mm/kasan/report.c:430 [inline] kasan_report+0x118/0x130 mm/kasan/report.c:536 check_region_inline mm/kasan/generic.c:181 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:187 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_dec include/linux/atomic/atomic-instrumented.h:257 [inline] put_bh include/linux/buffer_head.h:323 [inline] end_buffer_read_sync+0x5c/0x90 fs/buffer.c:161 end_bio_bh_io_sync+0xa9/0xf0 fs/buffer.c:2700 req_bio_endio block/blk-mq.c:795 [inline] blk_update_request+0x2ee/0x1180 block/blk-mq.c:927 blk_mq_end_request+0x46/0x70 block/blk-mq.c:1054 blk_complete_reqs+0xa0/0xd0 block/blk-mq.c:1132 __do_softirq+0x1d0/0x901 kernel/softirq.c:571 run_ksoftirqd kernel/softirq.c:939 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:931 smpboot_thread_fn+0x548/0x8c0 kernel/smpboot.c:164 kthread+0x2e6/0x3c0 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the virtual mapping at [ffffc9000c698000, ffffc9000c6a1000) created by: kernel_clone+0xb8/0x5f0 kernel/fork.c:2774 The buggy address belongs to the physical page: page:ffffea0001d838c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x760e3 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 19972, tgid 19972 (syz-executor921), ts 517849475630, free_ts 517824837769 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x1190/0x2e20 mm/page_alloc.c:4326 __alloc_pages+0x1c7/0x490 mm/page_alloc.c:5592 vm_area_alloc_pages mm/vmalloc.c:2957 [inline] __vmalloc_area_node mm/vmalloc.c:3033 [inline] __vmalloc_node_range+0x7fb/0x1060 mm/vmalloc.c:3205 alloc_thread_stack_node kernel/fork.c:311 [inline] dup_task_struct kernel/fork.c:982 [inline] copy_process+0x1110/0x6ba0 kernel/fork.c:2190 kernel_clone+0xb8/0x5f0 kernel/fork.c:2774 __do_sys_clone+0xa1/0xe0 kernel/fork.c:2917 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1454 [inline] free_pcp_prepare+0x5c7/0xa30 mm/page_alloc.c:1504 free_unref_page_prepare mm/page_alloc.c:3388 [inline] free_unref_page_list+0x172/0xbc0 mm/page_alloc.c:3529 release_pages+0x31c/0x10c0 mm/swap.c:1042 tlb_batch_pages_flush+0x85/0x160 mm/mmu_gather.c:97 tlb_flush_mmu_free mm/mmu_gather.c:292 [inline] tlb_flush_mmu mm/mmu_gather.c:299 [inline] tlb_finish_mmu+0x110/0x6c0 mm/mmu_gather.c:391 exit_mmap+0x23d/0x640 mm/mmap.c:3081 __mmput+0xf3/0x440 kernel/fork.c:1208 exit_mm kernel/exit.c:563 [inline] do_exit+0x885/0x2470 kernel/exit.c:856 do_group_exit+0xb0/0x250 kernel/exit.c:1019 __do_sys_exit_group kernel/exit.c:1030 [inline] __se_sys_exit_group kernel/exit.c:1028 [inline] __x64_sys_exit_group+0x35/0x40 kernel/exit.c:1028 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffffc9000c69f880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9000c69f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 >ffffc9000c69f980: f1 f1 f1 f1 01 f2 00 f2 f2 f2 00 00 00 00 00 00 ^ ffffc9000c69fa00: 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 ffffc9000c69fa80: 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00 00 00 00 ==================================================================